Tommy was angry that his mother chose to call him on messenger because he wanted her to spend money on him; whether a birthday card or a phone call.
Money, her spending money on him was the key.
Abusers, like Tommy, judge everything by money. This is because they make few personal, moral, or emotional connections.
The Abuser, who knows he is inferior, can not use education, position, achievement to elevate himself. Money does not require what the Abuser does not possess.
If Tommy has $100 in his pocket he is superior to everyone who has less. If he has $1000, he has more persons he can feel superior to.
Money is the most important thing to many Abusers, especially children who Abuse their parents who will not be leaving them fortunes.